grotopologyreader.cc: read box size (fixed issue 135)
grotopologyreader.cc: read box size (fixed issue 135)

MrTheodor/csg,junghans/csg,votca/csg,MrTheodor/csg,junghans/csg,junghans/csg,votca/csg,MrTheodor/csg,junghans/csg,junghans/csg,votca/csg,votca/csg,MrTheodor/csg,MrTheodor/csg,junghans/csg